Process of making polyurethane elastomer thread

Details Process of making polyurethane elastomer thread Process of making polyurethane elastomer thread

1993-10-28

1994-11-08

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

26421114, 2642905, 528 76, 528 80, 528 83, D01D 5092, D01D 516, D01F 670

Patent

active

053624335

ABSTRACT:
In a process for producing melt-spun elastomer threads with a high modulus, a breaking elongation of 80 to 300% and a boiling shrinkage of at least 20%, multifilament elastic threads are obtained by spin-drawing. A molten mass of polyurethane granulate is simultaneously drawn at a drawing factor of at least 1.5 and wound on spools at 600 m/min. or more. The spun-drawn, non-adhesive TPU thread can be processed to form a flat structure, the elasticity of which can be regulated by setting or by tempering in hot water. The thread can also be tempered before being processed in order to acquire the desired elastic properties.

REFERENCES:
patent: 3536803 (1970-10-01), Epstein et al.
patent: 3663677 (1972-05-01), Keuchel
patent: 3679633 (1972-07-01), Matsubayashi et al.
patent: 3686387 (1972-08-01), Keberle et al.
patent: 4751139 (1988-06-01), Hensel et al.

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